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Transient analysis of passive residual heat removal system under blackout accident

Changqi Yan

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Abstract

Passive residual heat removal(PRHR) system is capable of removing the core residual heat without the driving of external energy during the period of emergency shutdown.RELAP5/MOD3.2 is used to simulate and analyze the transient proceeding of AP1000 nuclear power plant with PRHR system under blackout accident.The results show that the core residual heat is able to be removed effectively using natural circulation and the capacity of system can be assured by PRHR system which is rationally designed.In addition,the influence of the height between cold and hot sources for PRHR system on the capacity of natural circulation is analyzed according to the results.

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What this paper is about

Passive residual heat removal(PRHR) system is capable of removing the core residual heat without the driving of external energy during the period of emergency shutdown.RELAP5/MOD3.2 is used to simulate and analyze the transient proceeding of AP1000 nuclear power plant with PRHR system under blackout accident.The results show that the core residual heat is able to be removed effectively using natural circulation and the capacity of system can be assured by PRHR system which is rationally designed.In addition,the influence of the height between cold and hot sources for PRHR system on the capacity of natural circulation is analyzed according to the results.

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Available abstract

Passive residual heat removal(PRHR) system is capable of removing the core residual heat without the driving of external energy during the period of emergency shutdown.RELAP5/MOD3.2 is used to simulate and analyze the transient proceeding of AP1000 nuclear power plant with PRHR system under blackout accident.The results show that the core residual heat is able to be removed effectively using natural circulation and the capacity of system can be assured by PRHR system which is rationally designed.In addition,the influence of the height between cold and hot sources for PRHR system on the capacity of natural circulation is analyzed according to the results.

Key concepts: Blackout, Natural circulation, Residual, Nuclear engineering, Shutdown, Transient (computer programming), Environmental science, Nuclear power plant

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